Machine for beveling plow-colters



(No Model.) 4 Sheets-Sheet 2.

R.'G.NUGENT. v MACHINE FOR'BEVELING PLOW GOLTERS. No. 248,053.Patented-0013.: 11*; 118 811 7 WITNESSES v UNITE STATES RICHARD (1.NUGENT, OF PITTSBURG, PENNSYLVANIA.

MACHINE FOR *BEVELING PLOW-COLTERS.

SPECIFICATION forming part of Letters Patent No. 248,053,'dated October11, 1881.

Application filed May 27, 1881. (No model.)

To all whom it may concern Be it known that I, RICHARD G. NUGENT, ofPittsburg, in the county of Allegheny'and State of Pennsylvania, haveinvented a new and useful Improvementin Machines for FormingCutting-Edges on 'Oolters and other Artiales; and I do hereby declarethat the follow; iugis afull, clear, and exact description thereof,reference being bad to the accompan yin g drawings, and to the lettersof reference marked thereon.

My invention relates to an improvement in machines for formin gcutting-edges on colters or other articles; and it consists in securingthe article to be finished with a cutting or beveled edgeiu a centralposition between pivoted clampin g-disks held in an adjustableframesusceptible of being moved in a horizontal plane from or toward andbetween revolving dies, which, by compression on the periphery of thecolter or other article, will rotate it and the clamping-disks, and bysaid compression and rotation form a uniform bevel and cutting-edge onsaid colter, as will hereinafter more fully appear.

The means heretofore employed for forming cutting-edges on coltersandother similar articles are as follows: first, subjecting the disk tothe action ofa hammer or press and rotating or turning the disk withrelation to the hammer bymeansoftongs; second, by pivotingthe disk uponor by a center-pin and subjecting the disk to the action of an eccentricroll. or rolls, the disk being rotated by the operator; third, byfrequent passing of the edge of the blank or colter between beveledrolls; fourth,'by grindingthe periphery of the colter; fifth, by formingthe bevel by means of a turning process, all of which methods areobjectionable and have been found impracticable for many reasons, amongwhich may be stated, first, requiring skilled and experienced labor;second, liability of warping the colter, which is usually formed from athin disk of metal; third, a tendency to destroy the center opening ofthe colter, givingto said opening an oval form; fourth, a tendency toform an irregular cutting-edge; fifth, said methods requiring too muchtime in the production of a colter with a true cutting-edge; sixth, saidmethods involve a loss of time and greater expense than should beincurred in the manufacture-of colters and similar articles'havingcutting-edges.

To enable others skilled in the artwith which part ofmyspecification,Figure l is a top View or plan of my improvement inmachines for forming bevel-edges on colters and other articles. Fig. 2is a side elevation of the same. Fig. 3 is a vertical and longitudinalsection of the same. Fig. 4 is an end elevation of the same.

In the accompanying drawings, A represents the frame of the machine, inwhich are pivoted shafts B, G, and D, the shaft B having secured thereona wheel, E, which meshes into a wheel, F, on shaft 0, which wheel Fmeshes into a wheel, G, on the shaft D. The shafts O and D are furnishedwith wheels H and I, which mesh into each other. On the ends of theshafts O l) are circular dies J and K, having beveled edges L, whichform a V-opening, M, between, corresponding. to the bevel desired forthe cutting-edge of the colter. The shafts U D for the circular dies J Kare furnished with adjustable bearings a 1), between which are placedspiral springs c. In the frame are adjusting-screws N, for movingvertically the bearings a of the shaft D, thereby causing the die J toimpinge upon the upper and outer edge of the colter, which will causethe outer and lower edge of the colter to impinge upon the die K.

To the frame A is secured a frame, B, having in it an opening, X, inwhich is secured an adjustable frame, A, having detachable parts Z andY, furnished with screw-threads g and o, and a screw-nut, U. The parts Zand Yare furnished with screws R S T. In the part Z is an opening, inwhich is placed a detachable cylindrical step, f, for the axis 6 of thedetachable clamping-disk P. The upper end of the axis of the disk, Pextends upinto an opening in the center of the clamping-disk O, the axisof which is pivoted upon the lower end of the adj listing-screw R. Theframe A is fitted to and held in the frame B through the medium of theplate W and screw-nut U, andis moved from and toward the dies J and K bymeans of the screw T. The disks and their axis revolve on coniformcenters. (Clearly shown in Fig. 3.)

The operation of the machine is as follows The operator, through themedium of the screw R,elevatestheclamping-diskO,andthenplaces theeolter-blank it between the clamping-disks O and P, with the axis Q ofthe disk P in the opening of the colter-blauk, as shown in Fig. 3. Theclamping-disk O is then, by means of the screw R,lowered, so as to clampthe blank h firmly between the clamping-disks O and P. Motion beinggiven to the shaft B, it will be transmitted by the wheels E, F, G, H,and I to the shafts O and D, and thereby revolve the dies J and K. Theoperator then, by means of the screw T, moves the frame A and itsclamping-disks 0 and P, with the blank 71, toward the dies J and K,forcing the periphery of the blank into the recess M formed by saiddies, which impinging on the blank will cause it and the clampingdisks OP to revolve, and the forward pressure caused by the screw T and theimpinging of the dies J and K on the blank It will form the cutting-edgeon said blank, as shown in Fig. 3. The frame-A is then, by reversing themotion of the screw '1, drawn back. The clamping-disk O is then, byscrew R, elevated and the colter removed. The

machine is then ready for the reception of another blank. Theclamping-disk P can be adjusted with relation to the recess M betweendiesJ and K by means of the screws S. By means of the machinehereinbefore described colters can be furnished with cutting-edges withgreat facility and diminished cost by unskilled labor.

Having thus described my improvement, what I claim as of my inventionis- 1. In a machine for forming" the cuttingedge on colters or similararticles, the combination of the frames Aand B,clamping-disks O and P,screws R S T, dies J K, and their operating, mechanism, substantially asherein described.

2. In a machine for forming the cuttingedge on colters or similararticles, the combination, with the revolving dies J K, of-the recessedclamping-disk P, PI'OXltlGtl with the axis Q, and the clamping-disk 0,provided with a recess for the reception of said axis Q, substantiallyas and for the purpose herein shown and described.

RICHARD O. NUGENT.

Witnesses:

A. C. JOHNSTON, D. H. CHAMBERS.

